1. What change had happened to the balloon from daytime to nighttime? 2. What do you think cause the change in the size of the balloon? 3. How will you compare the temperature of the surroundings between daytime and nighttime? 4. What is the effect of temperature to the size of the balloon? 5. Based on your observations on the pictures above, complete the statements using the words in the box. The volume occupied by a fixed amount of gas is directly proportional to its _______________________, if the ______________ remains constant. Which means that, as the temperature increases, the volume ______________. As the temperature ______________, the volume decreases​